This is a very high pressure supercritical water cooled reactor which operates above the thermodynamic critical point of water to give a thermal efficiency about one third higher than today’s light water reactors. The supercritical water (25 MPa and 510-550°C) directly drives the turbine without any secondary steam system. Passive safety features are similar to
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Like other helium gas cooled reactor which have operated or are under development, these will be high temperature units of 850°C, suitable for power generation, thermochemical hydrogen production or other process heat. For electricity, the gas will directly drive a gas turbine. (Brayton cycle) and steam turbine cycle. Fuels would include depleted Uranium and any
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In fast breeder reactor, enriched Uranium (U235) or Plutonium is kept in the casing without using moderator. The casing is surrounded by a thick blanket of fertile Uranium (U238). This is known as breeding material. Fig shows a schematic diagram of a fast breeder reactor. Fast moving neutrons are liberated due to fission of enriched
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The arrangement of boiling water reactor is simple when compared to the pressurised water reactor. The nuclear power plant using boiling water reactor is shown in fig. In this type of reactor also, enriched uranium is used as a fuel and water is used as a moderator, coolant and reflector in PWR. Only difference between
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Heavy water cooled and moderated type reactor (or) CANDU (Canadian Deuterium Uranium) Reactor: This type of reactor was designed and developed in Canada. In this reactor, heavy water (99.8% deuterium oxide D2O) is used as moderator and coolant as well as the neutron reflector. These reactors are more economical to those countries which do not
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A pressurised water reactor is a light water cooled and moderated reactor having an unusual core design using both natural and highly enriched fuel. The nuclear power plant using a prescribed water reactor is shown in fig. The main components of the reactor are: Reactor. Pressuriser Heat exchanger Coolant pump. The components of the secondary
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Fig shows a schematic diagram layout of nuclear power plant. In nuclear power plants, the reactor function is similar to the furnace of steam power plant. It contains pressure vessel, fuel rods, moderator, shielding as shown in fig. There are various types of reactors used in practice which will be discussed later. The fuel elements
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Micro-hydro, defined as a plant between 10kW and 200kW, is perhaps the most mature of the modern small-scale decentralised energy supply technologies used in developing countries. Micro hydro power plant is energy from water sources such as the ocean, rivers and waterfalls. “Micro-hydro” means which can apply to sites ranging from a tiny scheme to
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A method of maintaining the speed of the turbine is constant irrespective of variation of the load on the turbine known as governing of turbine. The governors regulate the rate of flow to the turbine in such a way that the speed of the turbine is maintained constant as far as possible under varying load
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Rotational speed of the turbine Specific speed Maximum efficiency Part load efficiency Head Type of water Runaway speed Cavitation Number of turbine units Overall cost. Rotational speed of the turbine Turbines are used to produce mechanical energy which is again converted into electrical energy by coupling the generator through the shaft. Here, the speed of
Factors to be Considered to Select the Right Type of Water Turbine Read More »